Count Dooku is one of Star Wars' most popular ... In retaliation, Dooku and Palpatine sent General Grievous to commit a massacre that was arguably just as devastating as Order 66.
General Grievous may have had a high midi-chlorian ... Grievous may have learned the Jedi arts from Count Dooku, but he didn't need to be a full Jedi to wield a lightsaber effectively.